Hi and welcome to the Forum,
The marks show your beaker to be solid silver and made in Nuernberg (Nuremberg). I'm no expert in this area, however we have members who are, and will be able to date it more accurately than I, and may possibly be able to identify the maker.
If my comparisons of your Nuremberg letter N to those on the website owned by one our members is correct,
(
http://silberpunze.freehost.ag/index.php?sw=Nuernberg),
then I think it's probably late 18th C...and definitely no later than 1820. So wait and see what the others have to say.
Cheers,
Steve